| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 0 |
0%
|
| 2 | No | 0 |
0%
|
| 9 | 1 |
0.2%
|
|
| 1980 | 9 |
1.8%
|
|
| 1982 | 2 |
0.4%
|
|
| 1984 | 6 |
1.2%
|
|
| 1985 | 13 |
2.6%
|
|
| 1986 | 9 |
1.8%
|
|
| 1987 | 5 |
1%
|
|
| 1988 | 11 |
2.2%
|
|
| 1989 | 6 |
1.2%
|
|
| 1990 | 37 |
7.5%
|
|
| 1991 | 11 |
2.2%
|
|
| 1992 | 19 |
3.9%
|
|
| 1993 | 11 |
2.2%
|
|
| 1994 | 22 |
4.5%
|
|
| 1995 | 27 |
5.5%
|
|
| 1996 | 16 |
3.3%
|
|
| 1997 | 10 |
2%
|
|
| 1998 | 33 |
6.7%
|
|
| 1999 | 17 |
3.5%
|
|
| 2000 | 33 |
6.7%
|
|
| 2001 | 20 |
4.1%
|
|
| 2002 | 28 |
5.7%
|
|
| 2003 | 27 |
5.5%
|
|
| 2004 | 32 |
6.5%
|
|
| 2005 | 40 |
8.1%
|
|
| 2006 | 26 |
5.3%
|
|
| 2007 | 11 |
2.2%
|
|
| 2008 | 8 |
1.6%
|
|
| 2009 | 1 |
0.2%
|
|
| Sysmiss | 3 |